Means for detachably mounting strainer bags



y MEANS FOR DETACHABLY MOUNTING STRAINER BAGS Filed Ag. .17, 1944v l 5 v 5fl/lllll/llllIllllllllllllllllllll(llll//ll IA y Patented Aug. 14, 1945 of Delaware 1 Application-August 17,1944, Serial No. 549,896 f y3 claims. (or. 21o- 190) Th'is invention relatesy to improvements in 'A f strainer apparatus for separating'suspended solids.' from liquid `passed therethrough, whereby to clarify and cleanse the liquid .for initial, or res This invention has novelv constructionof'strainer device provided with clean liquid receiving and Vdischarge means having'one or more bag-,like strainer elements through which the liquid to be strained is passed ksaid bags thereto, whereby the latter maylbe `quickly and easily detachably .assembled therewith.

Another y'object of this invention isto provide for anobject to provide a l to saidreceivingand ldischarge means, and provided with' novel means for detachably coupling l a simple, self-acting means vfor receiving and holding a strainer bagn easily releaseable operative coupled relationto the clean liquid lref ceiving and dischargemeans, and so as to automatically abut the discharge mouth of the bag in sealed relation to a, wall of the liquid receiving and disch'arge means, but with `the bag interior in communication with interiorof said receiving and discharge means. y

The invention has'ior a further Vobject 4to provide a strainer device wherein the structure .for

supporting a strainer bag comprises a, wall having at its exterior side cooperating opposed, laterally spaced slideway members to straddle a` iuid passage therein and to receive and straddle the mouth end o f said bag, and wherein said bag is expanded byl an inserted open-work frame having an external top'rimmember around which marginal portions of the bag may be inwardly folded, wh'ereby to form, with the top rim member enclosed thereby, external shoulder portions adapted to be slidably entered in yand .between said slideway members; the bottom flanges of said slideway members having upwardly bowed thrust spring elements adapted to engage beneath said vention; Fig. r2 isa side elevationalview of, the same; and Fig.-3 is a transversevertical sectional view, taken on line 3 3 in Fig. 1 but omitting the strainer bag, said -view being drawn on an enT larged scale.

. Fig. 4 is a Viewy similar to that of Fig., abut showing a modified form and arrangement of strainer bag coupling spring means. v y

.Similar characters of reference are employedin the hereinabove `described views, to indicate corresponding parts. vIn the illustrative embodiment oi this invention as shown, the strainer device includes .a rigid wall or plate Il) adapted to form one sidefofa clean liquid collecting chamber I Il. Leading from said chamber I I is means for connecting the same ytoa clean liquid discharge conduit or'pipey (not shown), said means Ibeing illustrativelyshown in\ the forniy of Aan exteriorly projectingfnipple vrI2, which is suitably screw-*threaded for unionwith saidy discharge conduit or pipe. 'Said wall lor plate A.I IJ is provided with one -or more cleanliquid passages or openings I3. The number of said pas: sages or openings I3 may be varied according to the amountY of straining capacity desired to'be obtained, which is governeduprincipally by the number of strainer bags with which thefstrainer device is provided. Said passages oropeningsy I3 are spaced one from another so that a strainer bag may bemounted for communication with' each.

vice vmay be otherwise constructed than above illust'ratively set forth, so long as it includesa wall orfrigid plate with which the strainer bag or bags may be coupled by lthe novel attachment meanshereinafter described.

Thestrainer medium per se comprisesl one or more bag-like elements I4 according toth'e nurnber of intake passages or openings with which't'he shoulder portions', whereby to -both tightly press 'v the mouth of the bag into self-sealing abutment against the strainer-device wall, and tc frictionally grip and hold the bag against accidental displacement from such' assembled relation to the strainer device.

Other objects of this invention, not attliis time more particularly enumerated, will be understood from the fc'illowingv detailed descriptionv of the Same. i

Illustrative embodiments vof this inventionare Y shown in the accompanying drawing, in which:

Fig. 1` is ankend elevational View, with parts in section, of a strainer device accordingto this incollecting chamber or. the device is provided, Each strainer bag I4 is expanded by means of an open-workiframe which isinserted therein. Said frame, in a preferred `construction thereof, comprises a series of transverse U-shaped body'mem- A bers I5 made of strong and comparatively rigid metallic rod or wire stock. Said ,ll-shaped members I5 are spaced apart, and to upper r terminals 0f their legs is joined an external top-rim member I6 which denes th'e open or mouth end of the frame. The lower or closed ends of the U- shaped body members are secured together.

against relative displacement'by a transverse tierod I'I extending across said ends. ,The described It will be understood that' the cleanliquid receiving and discharge means of the strainer dethereof. lThe strainer bag being of somewhat.j greater length than the length of the frame, when the latter is inserted in the bag, a .marginal portion I8 of the mouth end of said bag will project exteriorly beyond the top-rim member I f6 ofthe frame. turned inwardly and folded over and around the frame top-rim member I5, and then tucked into the bag interior. By reason of this arrangement, not only is the bag and frame disposed in oper- Such projecting marginal portion I8Yis ative assembled relation, but the mouthof the bag is symmetrically shaped and firmly supported by the enclosed frame top-rim member I6, whereby to provide, along the top side of the latter, bag portions backed thereby and disposed to provide compressible seatin-g and sealing lip portions I9 to abut the strainer device wall I0, but also to provide, along the underside of the covered external top-rim member I6, outwardly off-set shoulderportions for cooperation with means to operatively and detachably couple the bag in `assembled relation to the wall I0, as will presently appear. i The strainer bags may-be made of any suitable material or materials which provide the necessary liquid pervious interstitial or porous structure suitable for straining effect. A very satisfactory bag comprises one made of knitted mesh fabric, knitted lfrom `metallic wire, or natural or syn- /thetic fiber strands, or compositely lfrom both. The novel means for detachably assembling a strainer'bag in operative relation -to a strainer device'wall, according to the invention, comprises,

for 'eachV bag, a pair of opposed, laterally spaced L-shaped slideway members 2i, which are suitably secured to the exterior side of .a strainer device will II) so as to straddle `a clean liquid intake passage or opening I3 of said wall; Said slideway members are laterally spaced to, receive and accommodate the upper open end or mouth portion of a frame expanded bag, and said slideway members are each provided along their lower portions with inwardlyjprojecting bottom flanges 22` to underlie external shoulder portions 20 vof the mouthbf the frame expanded bag. Mounted on the respective bottom flanges 2U of said rslidef. way members 2| are upwardly bowed leaf spring members 23. These leaf spring members23 are provided with butt ends 24 which aresuitably se'- cured,'as e. g., by welding, to said bottom flanges tion to `said liquid 22; lthe opposite ends 25 of said leaf spring members being free. v l

Said leaf spring members 23 are opposed to the exteriorl face ofthe strainer device wall I0. To apply Va frame expanded bag lIII to the described 'holding means, the frame tope-rim supported portion of the bag mouth is entered between the opposed slide-way members 2|, and slid into the embrace thereof, so that the shoulder portions 20 ride onto the leaf spring members 23V, thus en'- a'ging said frame top-rim supported portions of the bag mouth between the latter and the exterior face of the strainer device wall Ill; ,Said leaf spring members tensiona'lly yield to,v such engagement, and thereby the spring members `are causedto exert an 'upward thrust `upon Ythe frame top-rim supported portions of the bag mouth, thus not only strongly pressing the seating and sealing lip portions IIS in sealing abutment against the exterior surface of the strainer device wall I0, but also effecting a strong frictional grip upon the frame top-rim supported portions of the bag mouth, whereby to hold lthe bag firmly andsecurely against clisplacement, and yet nevertheless subject to manual release or detachment merely by sliding the same outwardly from the embrace of said slidewayy members and their spring members.

It will be obvious that the novel strainer bag attachment means involves no parts which per se require manipulation, but rather said means is self-acting, and automatically engage or disengage the bag accordingly as the latter is slid into vor out of the embrace of the slideway members and their leaf springs.

As shown in Figs. 1 to 3 inclusive, the leaf springs 23 may constitute a single long spring member mounted on each bottom flange 22 of the slideway members. `If desired, however, a pluvral-ity of springs` may be mounted on the bottom fiangeZZ of each slideway'member. For example, as shown in Fig. 4, each such bottom ange may be'provided withat least two leaf springs 23', longitudinally spaced along the same.

Having nowdescribed ourinvention, we claim:

l; A strainer device provided with a clean liquidA receiving and discharge means having an external wall provided with liquid passage means entering therethrough, a strainer bag, an openwork frame `within said bag whereby to expand the bag, said frame having externally projecting top rim means lying within the open mouth of the bag and about which marginal portions of the bag mouth wallsare folded in enclosing relation thereto so as to provide external shoulder portions adjacent the bag mouth, laterally spaced slideway members depending from said wall to straddle said liquid passage means therein, spring means carried by said slideway members, said shoulder portions of the bag enclosed rim of said frame `being slidably movable onto said slideway members so that said shoulder portions are engaged-by' said spring means, whereby to releasably hold said'bag` in operative assembled relapassage means in said external wall. V y

2.' ln vastrainer device provided with a clean liquid receiving and discharge means having an external wall provided with liquid passage means entering therethrough, a strainer bag, an openwork frame within said bagv whereby to expand the bag, said frame having externally projecting'top rim means Ylying withinthe open mouth ofthe bag and about which marginal portions of the bag mouth walls are folded in enclosing re lation thereto, whereby to provide the bag mouth with rigidly backed, upwardly presented seating and sealing lip portions to abut the exterior face offsaid wall and outwardly offset shoulder por- Vl',ions,` .o-pposed laterally space L-shaped slideway members depending from said wall to straddle said liquid passage means therein, and spring means carried by said slideway members, said shoulder portions of Vthe bag enclosed rim of said frame'beingslidably movable onto said slideway members so'that said shoulder portions are engaged by said spring means, whereby'to releasably hold the bag Vin operative assembled relation tosaid liquid passage means in said external wall Yand the bag lip portions pressed into sealing abutment against said wall.

3." In a strainer device provided with a clean 'liquid' receiving and discharge means having an external wall provided with liquid passage means entering'therethrough, a strainer bag, an open- Work frame within said bag whereby to expand the. bag, said frame having externally projecting top rim means lying Within thevopen Amouth of the bag and about which marginal portions of the bagv mouth Walls are folded in enclosingr relation thereto, whereby to provide ythe bag mouth .with rigidly backed, upwardly presented seating and sealing lip portions to abut the exterior face of l said wall and outwardly offset shoulder portions, opposed laterally spaced slideway members. de-

` pending fromrsaid wall tol straddle said liquid passage means therein,' said slideway members having inwardly'projeeting bottom anges opposed to said wall, and upwardly bowed leaf spring means aflixed-to said bottom anges, said shoulder portions of the bag enclosed rim of said frame being slidably movable onto the bottom anges of said slideway members .so that said shoulder portions are engaged by said leaf spring means, whereby to releasably .hold the bag in 

